Humans are living longer than ever before. By 2050, scientists predict that nearly half a billion people could be older than 80. The rise in human life expectancy is partly due to improvements in nutrition, but which food choices lead to the longest and healthiest outcomes in older age? Scientists are still trying to figure that out. In younger cohorts, some particular diets are associated with years of added life, especially those focused on whole, plant-based foods and healthy fats . But meat